Hi guys, just receive the Momentus XT 500 hybrid HD today. I replaced it. And during the clean install of W7, I heard something really noisy from the Hard drive, it seems that it is louder than the default seagate 500GB one. What's going on? Why is it louder? Is there any replacement error? Something is not connecting correctly?

Also, when I look at the space available of the Hard Drive, notice that it only has 465 Go. Where are going the 35 Go?

not by much, depends on the SSD. If you're looking for a low-powered SSD then it's best to go for the Intel's or the Samsung 470's. I believe the Samsung uses 0.14 watts when idle and 0.25 watts when active. I'm pretty sure 2.5" hard drives use about 5-15 watts. In the end I guess you can save up a half hour of battery or so